Volume 92, Issue 2 pp. 198-203
Research

Retrogradation of Rice Flour Gel and Dough: Plasticization Effects of Some Food Additives

Thongkorn Ploypetchara

Thongkorn Ploypetchara

Food Safety Management and Technology, Rajamangala University of Technology Krungthep, Bangkok 10120, Thailand.

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Prisana Suwannaporn

Corresponding Author

Prisana Suwannaporn

Food Science and Technology, Kasetsart University, Bangkok 10900, Thailand.

Corresponding author. E-mail: [email protected]Search for more papers by this author
Chiravoot Pechyen

Chiravoot Pechyen

Packaging Technology and Material, Kasetsart University, Bangkok 10900, Thailand.

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Shoichi Gohtani

Shoichi Gohtani

Applied Bioresource Science, Kagawa University, Kagawa, 761-0795, Japan.

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First published: 22 October 2014
Citations: 11

Abstract

Certain food additives commonly used in flour products also have a plasticization effect on product shelf life regarding retrogradation. Sucrose, sorbitol, glycerol, citric acid, and acetic acid at 25, 25, 25, 0.5, and 0.5%, respectively, were added to two different starch gel systems: slurry (high-amylose rice flour gel) and dough (waxy rice flour dough). All plasticizers increased gelatinization temperature, decreased enthalpy (ΔH), and promoted a more homogeneous system. Sucrose had the greatest effect on gelatinization increase. Rice dough was more susceptible to plasticizers, resulting in higher moisture content and a more amorphous structure. Retrogradation was highly positively correlated with amylose content, moisture retention, ratio of protons of water/starch, and previous occurrence of retrogradation. Moisture retention was increased in plasticizer-added samples, especially waxy rice dough. Over a longer storage period, sucrose and sorbitol showed an antiplasticization effect in waxy rice flour dough, but glycerol and acid caused higher retrogradation in high-amylose rice flour gel.

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